Method of production of catalyst for afterburning of organic admixtures in gases

FIELD: catalytic chemistry; method of afterburning of organic admixtures and waste gases; chemical and petrochemical industries.

SUBSTANCE: proposed method is used for cleaning waste gases from styrene, toluene, isopropyl benzene, formaldehyde and oxidation products of higher fatty acids. Proposed method includes evacuation and impregnation of globular aluminosilicate zeolite-containing carrier; used as carrier is highly thermostable cracking catalyst to 100-% absorption by aqua solution of H2PtCl6 or PdCl2 at concentration of platinum or palladium of 0.4-0.8 g/l and volume ratio of impregnating solution to carrier of (0.6-0.08):1.0 of followed by sulfidizing with hydrogen sulfide and drying of catalyst. Proposed method makes it possible to clean waste gases from organic admixtures by 99.5-100%.

EFFECT: enhanced efficiency.

1 tbl, 5 ex

 

The present invention relates to catalytic chemistry, in particular to a method for producing a catalyst for post-combustion of the organic impurities in the waste industrial gases, and can be used in the chemical and petrochemical industry, for example, when cleaning the exhaust gases of the production of styrene, toluene, cumene, formaldehyde, oxidation products of higher fatty acids.

The known method (Lubelska E.N. The exhaust gas cleaning: the. review Anticentre. - M., 1990) preparation of aluminium oxide-platinum catalyst AP-56 for afterburning in the exhaust gas of formaldehyde (concentration of 220 mg/m3and gas vent pipe (concentration 2-120 mg/m3), including deposition of hydroperoxide aluminum from the sodium aluminate solution and 56%nitric acid, filtering the suspension hydroperoxide aluminum frame filter presses, washing the precipitate from the sodium nitrate with water, shaping the mass into extrudates with a diameter of 2.8-3.2 mm, length 3-9 mm, drying, calcining alumina extruded catalyst in the form of cylinders, at 550°With, impregnated with 3%aqueous solution of acetic acid, and then with a solution of hexachloroplatinic acid, drying.

The catalyst AP-56 (TU 38.101.486-77), obtained by a specified method, has a composition, % wt.: platinum 0,52-0,58, sodium oxide of 0.02; else Y - alumina. It is talization at the specified method reduces the styrene content in the exhaust gases of the production of synthetic rubber to 0.01 mg/m 3at a temperature of 450-500°and flow rate of the gas mixture 12000 h-1.

The disadvantage of this method is the low mechanical strength and thermal stability of the catalyst. After 5-6 months. operation, the catalyst is destroyed, irretrievably lost up to 50% of the expensive platinum.

Another disadvantage is the complexity of the technology of preparation of the catalyst, a high content of platinum and a relatively high temperature post-combustion gases.

The known method (Lubelska E.N. The exhaust gas cleaning: the. review Anticentre. - M., 1990) preparation of the catalyst IR-12-1, which contains 0,40-0,45% wt. platinum deposited on alumina promoted with rare earth elements (REE). Media - extruded aluminum oxide is prepared with the addition at the stage of obtaining a suspension of aluminum hydroxide REE in the amount of 1.5 to 5 wt.%, considering the composition of the finished catalyst. Platinum is applied to the extrudate is calcined carrier in excess of an aqueous solution of hexachloroplatinic acid with pre-treatment with an aqueous solution of acetic acid.

The catalyst obtained by this method, at 350°C, load 500000 h-1and the content in the flue gases up to 200 mg/m3formaldehyde has provided the degree of afterburning of 95-98%.

The disadvantages of this method are the I: the complexity of the technology of preparation of the catalyst is precipitation of aluminum hydroxide, filtering, washing, forming, drying, calcination, impregnation of the support with a solution of hexachloroplatinic acid, rapid wear of the extrudates of catalyst during its operation; low thermal stability, which leads to the destruction of the catalyst when the local temperature rises of up to 1000°in the reaction zone.

The known method (Patnr No. 146901, class B 01 J 33/42, 1989) obtain a catalyst for post-combustion of the organic impurities in gases, which comprises applying to the carrier of Y-A2O3of water 0,16%-aqueous solution (ethylene-diamine) platinum chloride. The impregnated carrier is dried, calcined in air flow and activate. The prepared catalyst zajigaet different organic compounds at temperatures of 20-30°lower than the catalysts prepared by impregnation of the support with a solution of H2PtCl6.

The disadvantages of this method are: low thermal stability of the catalyst, which at high local temperatures overheating when the afterburning of exhaust gases leads to the destruction of the granules of the catalyst and a significant loss of platinum, as well as cylindrical pellets, which is inefficient from the point of view of providing hydrodynamic mode of operation of the catalyst in the process of afterburning.

Known (AS the USSR №230100, class B 01 J 37/02, 1969) method of preparation of the catalyst,including the vacuum and impregnated aluminosilicate zeolite granules (in the form of a ball). As the crystalline component of the granules used type zeolite with a molar ratio of SiO2:Al2O3=4.5 to 5.5 in the amount of 20-30% by weight. to the x-ray amorphous aluminosilicate ball.

Zeolite is introduced into a solution of sodium silicate, forming balls comes from Zola with a pH of 7.2-7.4 in the presence of Al2(SO4)3in the solution of H2SO4at concentrations of 1H. 1,2H., respectively. Obtained after coagulation balls, after 1 hour of aging in the mother solution, activate the 2%solution of NH4Cl, washed up negative reaction to chlorine in the wash water, then dried at 150°C - 4 h, and calcined at 660° - 6 hours Receive granules with a bulk density of 0.56 g/cm3and strength of 7 kg/balloon when the diameter of the balls 3 mm

The catalyst prepared by the method of single impregnation of the zeolite aluminosilicate beads in an aqueous solution of H2PtCl6containing 4.4 g Pt per liter of solution. The amount of the activating solution is 80% of the volume occupied by the balls. Impregnation are under vacuum (residual vacuum 0,044 ATA). The solution serves for 0.5-1 min Catalyst coated with an activating solution, soaked for 1 h, after which propitiating report with the atmosphere and the catalyst together with an excess of a solution of H2PtCl6unloaded into a container and leave in the air during the day. Then catalizatorului at 110-120° C and calcined at 530-550°C. the Finished catalyst contains 0.5% wt. Pt.

The disadvantages of the method are: high concentration (0,5% wt.) platinum in the catalyst that makes it expensive, complex technology of preparation - preparation of special ball carrier, calcination, impregnation, drying and again calcining; insufficient activity of the catalyst when the ignition of organic compounds in gases.

The closest in technical essence and the achieved result is "a Method of producing a catalyst for post-combustion of the organic impurities in gases" (U.S. Pat. Of the Russian Federation No. 2072898, class B 01 J 29/74, B 01 J 37/02, 1997), which is chosen for the prototype. According to the prototype as a carrier to obtain a catalyst afterburners used ball catalyst cracking of ZOCOR PD composition, % wt.: Al2O3-8,5; SiO2-90,5; REE to 0.5; Na2O to 0.3; Fe2O3-0,2 (TU 38.1011114-87), which is a vacuum in the cylindrical propitiate to remove from the pores of the air, impregnated with platinum (palladium) 100% increase absorption of aqueous solution of H2PtCl6(Pd Cl2) when the concentration of Pt (Pd) 0.8 to 2.5 g/l and a volume ratio of solution to the media (0.6 to 0.8):1, after impregnation the catalyst sulfiderich hydrogen sulfide and dried at 120°C.

The iron content in the finished catalyst is less than 0.2% wt. compared to media ZOCAR PD, as castigo goes with hydrochloric acid impregnating solution, the content of Fe2O3not more than 0.001 wt.%, that does not affect the reduction in the activity of the finished catalyst.

The catalyst obtained in this way contains 0,08-0,16% wt. Pt (Pd) instead of 0.4-0,58% wt., the catalysts obtained by previously known methods. Due to the high dispersion of Pt (Pd) on the surface of the carrier (Sbeatsmedia ˜320-350 m2/g instead of 180-200 m2/g for the previously known method, the catalyst provides a high degree of gas purification from organic impurities 99-99,5%.

The known method has drawbacks:

- relatively high content of platinum (palladium) 0,08-0,16% wt. in the catalyst, which determines its high cost;

- not high enough mechanical strength of the catalyst (15-20 kg/bulb), which leads to mechanical destruction and, as a consequence, the loss of up to 20-30% of the expensive platinum;

- low thermal stability of the catalyst, since the crystalline quality of the component carrier (ball catalyst cracking of ZOCOR PD) use type zeolite with a molar ratio of SiO2Al2O3(module), equal to 4.7 and 4.9. At a temperature of approximately 900°there is a destruction of the crystalline structure of the zeolite in the catalyst and, as a consequence, "sintering" structure - reduction of the specific surface of the catalyst and, hence, loss visokog spirtnogo state of Pt (Pd) on the surface of the catalyst and reduce its activity in the reactions of treatment (afterburners) exhaust gases.

The aim of the invention is to obtain a catalyst with increased activity, mechanical strength and heat stability.

This goal is achieved by the fact that as the carrier used ball cracking catalyst C-100 ingredients: % wt. Al2O3-7,5; SiO2-90,2; REE -1,8; Na2O to 0.3; Fe2About3-0,2 (TU 38.1011372-00), which is a vacuum in the cylindrical propitiate to remove from the pores of the air, impregnated with platinum (palladium) 100%increase absorption of aqueous solution of H2PtCl6(PdCl2) when the concentration of Pt (Pd) of 0.4-0.8 g/l and a volume ratio of solution to the media (0.6 to 0.8):1, after impregnation the catalyst sulfiderich hydrogen sulfide, dried at 120°C.

Comparative analysis of the proposed method with the prototype allows to conclude that the claimed method differs from the known:

- use as a carrier ball alyumosilikoklasticheskie catalyst cracking C-100 with a specific surface area 380-480 m2/g instead of 320-350 m2/g for the well-known prototype;

- impregnation of new media solutions H2PtCl6or Pd Cl2when a volume ratio of impregnating solution to the media (0,6-0,8):1.0 and the concentration of platinum (palladium) of 0.4-0.8 g/l;

the content of Pt (Pd) catalyst, obtained by the new method, 0.04 to 0.08 wt.%. in the seat 0,08-0,16% wt. for the known method.

These techniques allow to conclude that the proposed solution meets the criterion of "novelty".

Analysis of the known methods for producing catalysts for post-combustion of the organic impurities in gases showed that the use as a carrier to obtain a catalyst afterburners ball alyumosilikoklasticheskie catalyst cracking is known. Also known methods and impregnation of the carrier with platinum (palladium) 100%increase absorption of aqueous solution of H2PtCl6(PdCl2).

However, only the fact that the use as a carrier to obtain a catalyst afterburners vysokotemperaturnogo ball alyumosilikoklasticheskie catalyst cracking C-100, impregnation which are solutions of H2PtCl6or PdCl2when the concentration of platinum (palladium) of 0.4-0.8 g/l and a volume ratio of impregnating solution to the media (0,6-0,8): 1,0 allows to obtain a catalyst for post-combustion of the organic impurities in gases having high activity, mechanical strength and heat stability.

The essence of the invention is as follows.

Media - ball cracking catalyst C-100 ingredients: % wt. Al2About3-7,5; SiO2-90,2; REE-1,8; Na2O to 0.3; Fe2O3-0,2 (TU 38.1011372-00), vacuum in the cylindrical about what itively to remove from the pores of the air, impregnated with platinum (palladium) 100%increase absorption of aqueous solution of H2PtCl6(PdCl2) when the concentration of Pt (Pd) of 0.4-0.8 g/l and a volume ratio of solution to the media (0.6 to 0.8):1, after impregnation the catalyst sulfiderich hydrogen sulfide, dried at 120°C.

The iron content in the finished catalyst is less than 0.2 wt.%, compared with native C-100, because part of it goes with hydrochloric acid impregnating solution. The content of Fe2About3not more than 0.001 wt.%, that does not affect the reduction in the activity of the finished catalyst. The sulfur content in the finished catalyst after acarnania is 0.04 to 0.08 wt.%.

Pt°+H2S→PtS+H2

The catalyst obtained by the proposed method contains 0.04 to 0.08 wt.%. Pt (Pd) instead of 0,08-0,16% wt. in the catalysts prepared by known methods. High dispersion of Pt (Pd) on the surface of the new carrier (Sbeatsmedia ˜380-480 m2/g instead of 320-350 m2/g for the known method provides a high degree of purification of gases from organic impurities of 99.5-100% during the flow process of afterburning in the outer diffuse field. Temperature afterburning 250-350°S, 50°With lower than for the prototype.

The catalyst obtained by the proposed method, has a high mechanical strength (20-35 kg/bulb), and by vysokotemperaturnogo media (katal the congestion cracking C-100 calcined at 700 to 750° With the current flue gases and water vapor) has a high thermal stability (at temperatures up to 1000°With no breaks).

Obtained by the new method, the catalyst provides 99.5-100% degree of purification of exhaust gases from the production of styrene, toluene, cumene, formaldehyde, oxidation products of higher fatty acids.

The invention is illustrated by the following examples:

Example 1. Ball carrier t-100 in the amount of 48 Gy (volume 80 ml) vacuum for 0.5 h at a residual pressure of 0.002 MPa, prepare 48 ml of an aqueous solution of H2PtCl6(PdCl2with the concentration of Pt (Pd) 0.8 g/l (the Ratio of solution to the media of 0.6:1). The catalyst was impregnated with 100%increase absorption within 1 h, sarnaut for 0.5 hours, dried at 120° - 4 hours.

The catalyst has the composition: % by weight. Al2O3-7,62; SiO2-90,2; REE-1,8; Na2O-0,3; Pt(Pd)-0,08. Bulk density of 0.68 g/cm3the strength 35 kg/balloon. The catalyst is tested in the process of afterburning of cumene in Thegas=25000 h-1temperature 300-500°C. the test Results of the catalyst obtained in example 1 and subsequent examples, presented in the table.

Example 2.(comparative) Catalyst is prepared analogously to example 1, but the ratio of the impregnating solution to the media to 0.8:1. The catalyst has a composition, by weight. Al2O3-76; SiO2-90,2; REE-1,8; Na2On-0,3; Pt(Pd)-0,1.

Example 3. The catalyst is prepared analogously to example 1, the concentration of the impregnating solution of Pt (Pd)and-0.4 g/l Catalyst has the composition: % by weight. Al2O3-7,66; SiO2-90,2; REE-1,8; Na2O-0,3; Pt(Pd)-0,04.

Example 4. (comparative) Catalyst prepared according to example 1, however, the volumetric ratio of the impregnating solution to the media of 0.5:1. The catalyst is a heterogeneous chemical composition due to the lack of impregnating solution to cover the entire volume of the carrier upon receipt of the catalyst.

Example 5. (comparative) Catalyst prepared according to example 3, however, the volumetric ratio of the impregnating solution to the media to 0.9:1. The carrier impregnated with platinum (palladium) flows in excess impregnating solution (not 100%increase absorption). The catalyst has the composition: % by weight. Al2O3-7,67; SiO2-90,2; REE-1,8; Na2O-0,3; Pt(Pd)-0,03.

Table.

The characteristic physico-chemical and catalytic properties of the catalysts.
ExamplesCharacterization of catalystsPurification efficiency, % temperature,°
Bulk density, g/cm3Strength, kg/balloonPIDm2/gComponents the stability at 1000° S, % (content of crumbs after thermal shock, %)300350400500
10,6835380100(0)99,499,79,9100
2*0,6830400100(0)99,599,9100100
30,6520480100(0)of 99.199,399,8100
4*0,683040099,8(0,2)97,298,498,699,5
5*0,651548092(8,0)91,296,298,4of 99.1
The placeholder0,65-0,715-20325-350100(0)the 98.9 99,190,0-99,299,4-99,699,6-99,8
* comparative examples.

Conditions of post-combustion styrene and cumene in their content 4000 mg/m3; Vgas=25000 h-1.

A method of producing a catalyst for post-combustion of organic CA is present in the gases, including evacuation and impregnation ball alyumosilikoklasticheskie media to 100% absorption of an aqueous solution of compounds of platinum or palladium, subsequent sulfatirovnie hydrogen sulfide and drying of the catalyst, characterized in that as the carrier is used vysokostabilnyy catalyst cracking C-100, and the impregnation of the carrier are solutions of H2PtCl6or PdCl2when the concentration of the platinum or palladium 0.4-0.8 g/l and a volume ratio of impregnating solution to the media(0,6-0,8): 1,0.



 

Same patents:

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12 cl, 2 tbl

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3 cl, 9 ex, 9 dwg

FIELD: structural chemistry and novel catalysts.

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41 cl, 3 dwg, 8 tbl, 10 ex

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12 cl, 1 tbl, 3 ex

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2 cl, 1 tbl, 16 ex

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8 cl, 2 tbl, 5 ex

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7 cl, 1 tbl, 10 ex

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17 cl, 3 dwg, 5 tbl, 3 ex

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The invention relates to the production of catalysts for selective reduction of NOx

The invention relates to catalytic chemistry, in particular, to a method for producing a catalyst for post-combustion of the organic impurities in the waste industrial gases and can be used in the chemical and petrochemical industry

FIELD: catalytic chemistry; method of afterburning of organic admixtures and waste gases; chemical and petrochemical industries.

SUBSTANCE: proposed method is used for cleaning waste gases from styrene, toluene, isopropyl benzene, formaldehyde and oxidation products of higher fatty acids. Proposed method includes evacuation and impregnation of globular aluminosilicate zeolite-containing carrier; used as carrier is highly thermostable cracking catalyst to 100-% absorption by aqua solution of H2PtCl6 or PdCl2 at concentration of platinum or palladium of 0.4-0.8 g/l and volume ratio of impregnating solution to carrier of (0.6-0.08):1.0 of followed by sulfidizing with hydrogen sulfide and drying of catalyst. Proposed method makes it possible to clean waste gases from organic admixtures by 99.5-100%.

EFFECT: enhanced efficiency.

1 tbl, 5 ex

FIELD: organic synthesis catalysts.

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EFFECT: increased and stabilized catalyst activity.

26 cl, 1 dwg, 5 tbl, 4 cl

FIELD: chemistry.

SUBSTANCE: invention refers to noble-metal catalyst, to method for making and application thereof. There is disclosed method for making noble-metal catalyst for hydrocarbon conversion, involving the stages as follows: a) preparation of the carrier containing zeolite, chosen from zeolites with medium and large pores and acid sites, at temperature within 423 to 1173 K and optional carrier modification; b) deposition of noble metal chosen from platinum, palladium, ruthenium, rhodium, iridium and their mixtures and combinations, by gas-phase deposition including evaporation of noble metal precursor chosen from β-diketonates and metallocenes, and interaction with the carrier, and c) heat treatment in oxidising or reducing environments. There is disclosed application of noble-metal catalyst produced by the method described above, in ring opening, isomerisation, alkylation, hydrocarbon reforming, dry reforming, hydrogenation and dehydrogenation, and preferentially, in ring opening of naphthenic molecules. Additionally, there is disclosed method for making medium diesel fuel distillate by introducing raw medium distillate into the reactor wherein it reacts at temperature 283-673 K and under pressure 10-200 bar with hydrogen with added noble-metal catalyst produced as described above until ring opening of naphthenes with two or more rings completed to produce isoparaffins, n-paraffins and mononaphthenes within medium distillate.

EFFECT: production of catalyst with improved selectivity for hydrocarbon conversion.

16 cl, 5 tbl, 20 ex

FIELD: chemistry.

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EFFECT: enhancing of the catalyst selectivity in transforming of lower alkanes to aromatic hydrocarbons.

30 cl, 3 dwg, 4 tbl, 2 ex

FIELD: chemistry.

SUBSTANCE: present invention relates to a catalyst for hydrolysis of cellulose or hydrolysis of cellulose and reduction of products of hydrolysis and a method of producing sugar alcohols from cellulose. Described is a catalyst for hydrolysis of cellulose and hydrolysis of cellulose and reduction of hydrolysis products in which a group 8-11 transition metal is deposited on a solid substrate. Described also is a method of producing sugar alcohols involving: hydrolysis of cellulose in the presence of the catalyst in a hydrogen-containing atmosphere at high pressure and reduction of the product of hydrolysis of cellulose.

EFFECT: easy separation of the catalyst from the product, avoiding the need to regulate pH, neutralise acid or alkali when producing alcohols, possibility of recycling a catalyst without activation thereof, obtaining sugar alcohols directly from cellulose using said catalyst.

19 cl, 2 tbl, 8 dwg, 6 ex

FIELD: process engineering.

SUBSTANCE: this invention relates to reductive isomerisation catalyst, dewaxing of mineral oil, method of producing base oil and lubrication base oil. Invention covers reductive isomerisation catalyst. Reductive isomerisation comprises molecular sieve treated by ionic exchange or its calcinated material produced by ionic exchange of molecular sieve containing cationic fragments and using water as the primary solvent, and at least one metal selected from the group consisting of metals belonging to group VIII-X of periodic system, molybdenum and tungsten applied onto molecular sieve treated by ionic exchange, or onto its calcinated material. Dewaxing comprises converting portion of or all normal paraffins into isoparaffins whereat mineral oil containing normal paraffins is brought in contact with abode described reductive isomerisation catalyst in the presence of hydrogen. Invention covers also method of producing lubricant base oil and/or fuel base oil implemented by bringing base oil containing normal paraffins in contact isomerisation catalyst in the presence of hydrogen. Invention covers also method of producing lubricant base oil containing normal paraffins, including 10 or more carbon atoms by bringing it in contact with above describe reductive isomerisation catalyst in the presence of hydrogen in conversion of normal paraffins making in fact 100%.

EFFECT: catalyst with high isomerisation activity and sufficiently low cracking activity at high yield.

22 cl, 8 tbl, 4 ex, 11 dwg

FIELD: chemistry.

SUBSTANCE: present invention relates to a hydroisomerisation catalyst, a method of producing said catalyst, a method for dewaxing hydrocarbon oil and a method of producing lubricant base oil. Described is a hydroisomerisation catalyst, obtained by calcining a catalyst composition containing an ion-exchanged molecular sieve or a calcined product thereof, wherein the ion-exchanged molecular sieve is obtained by ion-exchanging a molecular sieve in a solution which contains cationic groups, the molecular sieve includes nanocrystals having a pore structure of decahedral rings or octahedral rings and having a ratio of the pore volume to the external surface area ([pore volume]/[external surface area]) from 2.0×10-4 ml/m2 to 8.0×10-4 ml/m2, and contains an organic matrix and at least one metal selected from a group consisting of metals of Groups 8 to 10 of the Periodic Table of the elements, molybdenum and tungsten, deposited on the ion-exchanged molecular sieve or the calcined product thereof. Described is a method of producing the catalyst, involving a step (a) of hydrothermally synthesising a molecular sieve comprising nanocrystals having characteristics given above and an organic matrix; a step (b) of ion-exchanging the molecular sieve comprising an organic matrix in a solution containing a cationic groups to obtain an ion-exchanged molecular sieve; a step (c) of making the ion-exchanged molecular sieve or a calcined product thereof, carrying at least one metal selected from a group consisting of metals of Groups 8 to 10 of the Periodic Table of the elements, molybdenum and tungsten to obtain a catalyst composition; and a step (d) of calcining the catalyst composition. Described is a method of dewaxing hydrocarbon oil, involving bringing the hydrocarbon oil containing normal paraffins having 10 or more carbon atoms into contact with catalyst described above in the presence of hydrogen to convert a part of or all of the normal paraffins into isoparaffins. Described is a method of producing lubricant base oil in conditions for conversion of normal paraffins of substantially 100 wt %, the conversion being defined by the formula (1): conversion of normal paraffins (%)=[1-(total wt % of normal paraffins having Cn or more carbon atoms contained in mineral oil after contact)/(total wt % of normal paraffins having Cn or more carbon atoms contained in mineral oil before contact)]×100, where Cn denotes the minimum number of carbon atoms in normal paraffins having 10 or more carbon atoms contained in mineral oil before contact.

EFFECT: obtaining a catalyst with high isomerisation selectivity, stable and high output of hydrocarbon oils, suitable for lubricant base oils.

14 cl, 1 tbl, 8 ex, 2 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to zeolite containing platinum. Method of producing zeolite containing platinum comprises impregnating zeolite with platinum sulfite solution and calcination of impregnated zeolite in protective atmosphere. Obtained zeolite comprises, at least 2 wt % of platinum wherein, at least, 90% of platinum are located in zeolite pores. Besides, invention covers the application of aforesaid zeolite as oxidation catalyst and trap of hydrocarbons and catalyst component bearing said zeolite.

EFFECT: lower susceptibility to ageing, higher activity.

20 cl, 4 tbl, 7 ex, 3 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing base oil which involves bringing C10+ hydrocarbon material into contact with a catalyst and hydrogen in isomerisation conditions to obtain base oil. The catalyst contains a molecular sieve, having the topology of a MTT structure and crystallite diameter from 200 to 400 Å in the longest direction, at least one metal selected from a group consisting of Ca, Cr, Mg, La, Na, Pr, Sr, K and Nd, and at least one group VIII metal. The invention also relates to versions of a method for deparaffination of hydrocarbon material, using a similar catalyst.

EFFECT: use of the present invention enables to obtain a product with improved viscosity index at lower flow temperatures.

30 cl, 6 ex, 3 tbl, 11 dwg

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